What makes the K6/266 different from the
original members of the K6 line that made their debut on April 2 last year? First
of all, the die of the K6/266 (the chip itself, not the external casing) is manufactured
using a 0.25 micron circuit size, compared to the 0.35 micron die size of the previous K6
chips. Not only does this allow the K6/266 to run at higher clock speeds, opening
the world of Socket-7 Overclocking to an entirely new universe, but this die shrink
virtually eliminated the heat problems the original K6's gave users, especially when
overclocking.

This die shrink, walking hand in hand with the newly
lowered core voltage of the K6/266 (2.2v compared to the 2.9v setting for the 166/200MHz
K6's and the 3.2v setting for the 233MHz K6's) make the 266 everything the original K6
should have been...and then some.

The K6/266 accepts clock multipliers from 2.0x
up to 5.0x, with some 266's being reported as even supporting the 5.5x clock multiplier.
Using the 66MHz bus speed, and the 2.2v core voltage setting the 266 can be taken
as high as 300MHz...everything else becomes a little more complicated, so let's eliminate
some of those complications.

Overclocking the K6/266 deviates from the
conventional overclocking methods for Socket-7 processors. With the old K6's or the
Pentium MMX you could simply take the core voltage up to about 0.6v above the recommended
levels and achieve greater stability, provided that you could cool the chip properly.
This is definitely not the case with the K6/266. All voltages above 2.4v -
2.5v should be considered unusable with the K6/266, and you must keep in mind that just
because a motherboard states that it has a 2.2v voltage setting it doesn't necessarily
feed the processor 2.2v, rather something *around* that number. This is where the
quality of a motherboard can really come into play, your decision to skimp on your
motherboard to save a few bucks may just come back to haunt you.

300MHz can be achieved without increasing the
core voltage of your CPU much (if at all), at most you will probably have to take the CPU
up to 2.3v but no more. Booting at 333MHz (66 x 5.0) is a bit of a trick, it
requires a core voltage of a little more than 2.3v, therefore the key to running your
K6/266 at 333MHz is the use of a 2.4v core voltage setting. All of these settings
take for granted that you don't have the 75, 83.3, or 100MHz bus speeds at your
disposal...if you do...then things start to get interesting.